Which statement best explains why large predators, such as lions and leopards, are common in savanna grasslands, but are mostly absent from desert ecosystems?

a. there is not enough biomass at lower levels of the food chain in deserts for large predators to be supported.
b. biomass is passed through the food chain at a much higher rate of efficiency in grasslands, allowing large predators to exist.
c. there are no scavengers in deserts, but many in savannas, and this allows materials to cycle fast enough to support predators.
d. the 10% rule states that predators must make up 10% of the animals in ecosystems with a lot of biomass, like savanna ecosystems.

Clues to ecological principles are given in numerous passages of the bible. a bible study of ecology actually opens the doors to better understanding of god's love and concern for the earth. use a concordance to locate bible passages associated with words concerning our stewardship of the earth. you may use a dictionary to find synonyms for these words: dominion replenish subdue judgment stewardship find each of the passages using these words related to principles of ecology. list all passages by quote, book, chapter, and verse under each word. use your own interpretation to rewrite what you think each verse is saying. after your discussion of each of these words, ask one other person to explain his understanding of the word and a related verse without any hints. summarize what he tells you. a concluding paragraph for each of the words should be written noting similarities and differences between your interpretation and that of each person consulted.

The distribution of related animals and plants across the world

In which state was more than 100 billion tons of coal mined in 2005?